00346nam a2200121Ia 4500008004000000020001800040082001700058100001800075245005900093260003800152300001200190650002200202210210b1991   xxu||||| |||| 00| 0 eng d  a81 7054 142 5  a530.072 PANP  aPANDEY (N N).  aPerspective in physics education: a piagetian approch.  aNDbClassical Publishing Coc1991  axii,280  aPhysics education